# ========================================================================== # AIDA Detector description implementation # -------------------------------------------------------------------------- # Copyright (C) Organisation europeenne pour la Recherche nucleaire (CERN) # All rights reserved. # # For the licensing terms see $DD4hepINSTALL/LICENSE. # For the list of contributors see $DD4hepINSTALL/doc/CREDITS. # # ========================================================================== from __future__ import absolute_import, unicode_literals import logging from dd4hep_base import * # noqa: F403 import ddsix as six logger = logging.getLogger(__name__) def loadDDG4(): import ROOT from ROOT import gSystem # Try to load libglapi to avoid issues with TLS Static # Turn off all errors from ROOT about the library missing if('libglapi' not in gSystem.GetLibraries()): orgLevel = ROOT.gErrorIgnoreLevel ROOT.gErrorIgnoreLevel = 6000 gSystem.Load("libglapi") ROOT.gErrorIgnoreLevel = orgLevel import platform import os if platform.system() == "Darwin": gSystem.SetDynamicPath(os.environ['DD4HEP_LIBRARY_PATH']) os.environ['DYLD_LIBRARY_PATH'] = os.pathsep.join([os.environ['DD4HEP_LIBRARY_PATH'], os.environ.get('DYLD_LIBRARY_PATH', '')]).strip(os.pathsep) result = gSystem.Load("libDDG4Plugins") if result < 0: raise Exception('DDG4.py: Failed to load the DDG4 library libDDG4Plugins: ' + gSystem.GetErrorStr()) from ROOT import dd4hep as module return module # We are nearly there .... current = __import__(__name__) def _import_class(ns, nam): scope = getattr(current, ns) setattr(current, nam, getattr(scope, nam)) try: dd4hep = loadDDG4() except Exception as X: logger.error('+--%-100s--+', 100 * '-') logger.error('| %-100s |', 'Failed to load DDG4 library:') logger.error('| %-100s |', str(X)) logger.error('+--%-100s--+', 100 * '-') exit(1) from ROOT import CLHEP as CLHEP # noqa Core = dd4hep Sim = dd4hep.sim Simulation = dd4hep.sim Kernel = Sim.KernelHandle Interface = Sim.Geant4ActionCreation Detector = Core.Detector def _constant(self, name): return self.constantAsString(name) Detector.globalVal = _constant def importConstants(description, namespace=None, debug=False): """ Import the Detector constants into the DDG4 namespace """ ns = current if namespace is not None and not hasattr(current, namespace): import imp m = imp.new_module('DDG4.' + namespace) setattr(current, namespace, m) ns = m evaluator = dd4hep.g4Evaluator() cnt = 0 num = 0 todo = {} strings = {} for c in description.constants(): if c.second.dataType == 'string': strings[c.first] = c.second.GetTitle() else: todo[c.first] = c.second.GetTitle().replace('(int)', '') while len(todo) and cnt < 100: cnt = cnt + 1 if cnt == 100: logger.error('%s %d out of %d %s "%s": [%s]\n+++ %s', '+++ FAILED to import', len(todo), len(todo) + num, 'global values into namespace', ns.__name__, 'Try to continue anyway', 100 * '=') for k, v in todo.items(): if not hasattr(ns, k): logger.error('+++ FAILED to import: "' + k + '" = "' + str(v) + '"') logger.info('+++ %s', 100 * '=') for k, v in list(todo.items()): if not hasattr(ns, k): val = evaluator.evaluate(str(v)) if val.first == 0: evaluator.setVariable(str(k), val.second) setattr(ns, k, val.second) if debug: logger.info('Imported global value: "' + k + '" = "' + str(val.second) + '" into namespace' + ns.__name__) del todo[k] num = num + 1 if cnt < 100: logger.info('+++ Imported %d global values to namespace:%s', num, ns.__name__,) def _registerGlobalAction(self, action): self.get().registerGlobalAction(Interface.toAction(action)) def _registerGlobalFilter(self, filter): self.get().registerGlobalFilter(Interface.toAction(filter)) def _evalProperty(data): """ Function necessary to extract real strings from the property value. Strings may be emraced by quotes: '<value>' """ try: if isinstance(data,str): return eval(data) except: pass return data def _getKernelProperty(self, name): ret = Interface.getPropertyKernel(self.get(), name) if ret.status > 0: return _evalProperty(ret.data) elif hasattr(self.get(), name): return _evalProperty(getattr(self.get(), name)) elif hasattr(self, name): return _evalProperty(getattr(self, name)) msg = 'Geant4Kernel::GetProperty [Unhandled]: Cannot access Kernel.' + name raise KeyError(msg) def _setKernelProperty(self, name, value): if Interface.setPropertyKernel(self.get(), str(name), str(value)): return msg = 'Geant4Kernel::SetProperty [Unhandled]: Cannot set Kernel.' + name + ' = ' + str(value) raise KeyError(msg) def _kernel_phase(self, name): return self.addSimplePhase(str(name), False) def _kernel_worker(self): return Kernel(self.get().createWorker()) def _kernel_terminate(self): return self.get().terminate() Kernel.phase = _kernel_phase Kernel.registerGlobalAction = _registerGlobalAction Kernel.registerGlobalFilter = _registerGlobalFilter Kernel.createWorker = _kernel_worker Kernel.__getattr__ = _getKernelProperty Kernel.__setattr__ = _setKernelProperty Kernel.terminate = _kernel_terminate ActionHandle = Sim.ActionHandle def SensitiveAction(kernel, nam, det, shared=False): return Interface.createSensitive(kernel, str(nam), str(det), shared) def Action(kernel, nam, shared=False): return Interface.createAction(kernel, str(nam), shared) def Filter(kernel, nam, shared=False): return Interface.createFilter(kernel, str(nam), shared) def PhaseAction(kernel, nam, shared=False): return Interface.createPhaseAction(kernel, str(nam), shared) def RunAction(kernel, nam, shared=False): return Interface.createRunAction(kernel, str(nam), shared) def EventAction(kernel, nam, shared=False): return Interface.createEventAction(kernel, str(nam), shared) def GeneratorAction(kernel, nam, shared=False): return Interface.createGeneratorAction(kernel, str(nam), shared) def TrackingAction(kernel, nam, shared=False): return Interface.createTrackingAction(kernel, str(nam), shared) def SteppingAction(kernel, nam, shared=False): return Interface.createSteppingAction(kernel, str(nam), shared) def StackingAction(kernel, nam, shared=False): return Interface.createStackingAction(kernel, str(nam), shared) def DetectorConstruction(kernel, nam): return Interface.createDetectorConstruction(kernel, str(nam)) def PhysicsList(kernel, nam): return Interface.createPhysicsList(kernel, str(nam)) def UserInitialization(kernel, nam): return Interface.createUserInitialization(kernel, str(nam)) def SensitiveSequence(kernel, nam): return Interface.createSensDetSequence(kernel, str(nam)) def _setup(obj): def _adopt(self, action): self.__adopt(action.get()) _import_class('Sim', obj) o = getattr(current, obj) setattr(o, '__adopt', getattr(o, 'adopt')) setattr(o, 'adopt', _adopt) setattr(o, 'add', _adopt) def _setup_callback(obj): def _adopt(self, action): self.__adopt(action.get(), action.callback()) _import_class('Sim', obj) o = getattr(current, obj) setattr(o, '__adopt', getattr(o, 'add')) setattr(o, 'add', _adopt) _setup_callback('Geant4ActionPhase') _setup('Geant4RunActionSequence') _setup('Geant4EventActionSequence') _setup('Geant4GeneratorActionSequence') _setup('Geant4TrackingActionSequence') _setup('Geant4SteppingActionSequence') _setup('Geant4StackingActionSequence') _setup('Geant4PhysicsListActionSequence') _setup('Geant4SensDetActionSequence') _setup('Geant4DetectorConstructionSequence') _setup('Geant4UserInitializationSequence') _setup('Geant4Sensitive') _setup('Geant4ParticleHandler') _import_class('Sim', 'Geant4Vertex') _import_class('Sim', 'Geant4Particle') _import_class('Sim', 'Geant4VertexVector') _import_class('Sim', 'Geant4ParticleVector') _import_class('Sim', 'Geant4Action') _import_class('Sim', 'Geant4Filter') _import_class('Sim', 'Geant4RunAction') _import_class('Sim', 'Geant4TrackingAction') _import_class('Sim', 'Geant4StackingAction') _import_class('Sim', 'Geant4PhaseAction') _import_class('Sim', 'Geant4UserParticleHandler') _import_class('Sim', 'Geant4UserInitialization') _import_class('Sim', 'Geant4DetectorConstruction') _import_class('Sim', 'Geant4GeneratorWrapper') _import_class('Sim', 'Geant4Random') _import_class('CLHEP', 'HepRandom') _import_class('CLHEP', 'HepRandomEngine') def _get(self, name): a = Interface.toAction(self) ret = Interface.getProperty(a, name) if ret.status > 0: return ret.data elif hasattr(self.action, name): return getattr(self.action, name) elif hasattr(a, name): return getattr(a, name) msg = 'Geant4Action::GetProperty [Unhandled]: Cannot access property ' + a.name() + '.' + name raise KeyError(msg) def _set(self, name, value): """This function is called when properties are passed to the c++ objects.""" from dd4hep_base import unicode_2_string a = Interface.toAction(self) name = unicode_2_string(name) value = unicode_2_string(value) if Interface.setProperty(a, name, value): return msg = 'Geant4Action::SetProperty [Unhandled]: Cannot set ' + a.name() + '.' + name + ' = ' + value raise KeyError(msg) def _props(obj): _import_class('Sim', obj) cl = getattr(current, obj) cl.__getattr__ = _get cl.__setattr__ = _set _props('FilterHandle') _props('ActionHandle') _props('PhaseActionHandle') _props('RunActionHandle') _props('EventActionHandle') _props('GeneratorActionHandle') _props('PhysicsListHandle') _props('TrackingActionHandle') _props('SteppingActionHandle') _props('StackingActionHandle') _props('DetectorConstructionHandle') _props('SensitiveHandle') _props('UserInitializationHandle') _props('Geant4ParticleHandler') _props('Geant4UserParticleHandler') _props('GeneratorActionSequenceHandle') _props('RunActionSequenceHandle') _props('EventActionSequenceHandle') _props('TrackingActionSequenceHandle') _props('SteppingActionSequenceHandle') _props('StackingActionSequenceHandle') _props('DetectorConstructionSequenceHandle') _props('PhysicsListActionSequenceHandle') _props('SensDetActionSequenceHandle') _props('UserInitializationSequenceHandle') _props('Geant4PhysicsListActionSequence') class CommandLine: """ Helper to ease parsing the command line. Any argument given in the command line is accessible from the object. If no value is supplied, the returned value is True. If the argument is not present None is returned. \author M.Frank \version 1.0 """ def __init__(self, help=None): import sys self.data = {} help_call = help have_help = False for i in range(len(sys.argv)): if sys.argv[i][0] == '-': key = sys.argv[i][1:] val = True if i + 1 < len(sys.argv): v = sys.argv[i + 1] if v[0] != '-': val = v self.data[key] = val if key.upper() == 'HELP' or key.upper() == '?': have_help = True if have_help and help_call: help_call() def __getattr__(self, attr): if self.data.get(attr): return self.data.get(attr) return None class Geant4: """ Helper object to perform stuff, which occurs very often. I am sick of typing the same over and over again. Hence, I grouped often used python fragments to this small class to re-usage. \author M.Frank \version 1.0 """ def __init__(self, kernel=None, calo='Geant4CalorimeterAction', tracker='Geant4SimpleTrackerAction'): kernel.UI = "UI" kernel.printProperties() self._kernel = kernel if kernel is None: self._kernel = Kernel() self.description = self._kernel.detectorDescription() self.sensitive_types = {} self.sensitive_types['tracker'] = tracker self.sensitive_types['calorimeter'] = calo self.sensitive_types['escape_counter'] = 'Geant4EscapeCounter' def kernel(self): """ Access the worker kernel object. \author M.Frank """ return self._kernel.worker() def master(self): """ Access the master kernel object. \author M.Frank """ return self._kernel def setupUI(self, typ='csh', vis=False, ui=True, macro=None): """ Configure the Geant4 command executive \author M.Frank """ ui_action = Action(self.master(), "Geant4UIManager/UI") if vis: ui_action.HaveVIS = True else: ui_action.HaveVIS = False if ui: ui_action.HaveUI = True else: ui_action.HaveUI = False ui_action.SessionType = typ if macro: ui_action.SetupUI = macro self.master().registerGlobalAction(ui_action) return ui_action def setupCshUI(self, typ='csh', vis=False, ui=True, macro=None): """ Configure the Geant4 command executive with a csh like command prompt \author M.Frank """ return self.setupUI(typ='csh', vis=vis, ui=ui, macro=macro) def ui(self): """ Access UI manager action from the kernel object \author M.Frank """ ui_name = getattr(self.master(),'UI') return self.master().globalAction(ui_name) def addUserInitialization(self, worker, worker_args=None, master=None, master_args=None): """ Configure Geant4 user initialization for optionasl multi-threading mode \author M.Frank """ init_seq = self.master().userInitialization(True) init_action = UserInitialization(self.master(), 'Geant4PythonInitialization/PyG4Init') # if worker: init_action.setWorkerSetup(worker, worker_args) else: raise RuntimeError('Invalid argument for Geant4 worker initialization') # if master: init_action.setMasterSetup(master, master_args) # init_seq.adopt(init_action) return init_seq, init_action def detectorConstruction(self): seq = self.master().detectorConstruction(True) return seq def addDetectorConstruction(self, name_type, field=None, field_args=None, geometry=None, geometry_args=None, sensitives=None, sensitives_args=None, allow_threads=False): """ Configure Geant4 user initialization for optionasl multi-threading mode \author M.Frank """ init_seq = self.master().detectorConstruction(True) init_action = DetectorConstruction(self.master(), name_type) # if geometry: init_action.setConstructGeo(geometry, geometry_args) # if field: init_action.setConstructField(field, field_args) # if sensitives: init_action.setConstructSensitives(sensitives, sensitives_args) # init_seq.adopt(init_action) if allow_threads: last_action = DetectorConstruction(self.master(), "Geant4PythonDetectorConstructionLast/LastDetectorAction") init_seq.adopt(last_action) return init_seq, init_action def addPhaseAction(self, phase_name, factory_specification, ui=True, instance=None): """ Add a new phase action to an arbitrary step. \author M.Frank """ if instance is None: instance = self.kernel() action = PhaseAction(instance, factory_specification) instance.phase(phase_name).add(action) if ui: action.enableUI() return action def addConfig(self, factory_specification): """ Add a new phase action to the 'configure' step. Called at the beginning of Geant4Exec::configure. The factory specification is the typical string "<factory_name>/<instance name>". If no instance name is specified it defaults to the factory name. \author M.Frank """ return self.addPhaseAction('configure', factory_specification, instance=self.master()) def addInit(self, factory_specification): """ Add a new phase action to the 'initialize' step. Called at the beginning of Geant4Exec::initialize. The factory specification is the typical string "<factory_name>/<instance name>". If no instance name is specified it defaults to the factory name. \author M.Frank """ return self.addPhaseAction('initialize', factory_specification) def addStart(self, factory_specification): """ Add a new phase action to the 'start' step. Called at the beginning of Geant4Exec::run. The factory specification is the typical string "<factory_name>/<instance name>". If no instance name is specified it defaults to the factory name. \author M.Frank """ return self.addPhaseAction('start', factory_specification) def addStop(self, factory_specification): """ Add a new phase action to the 'stop' step. Called at the end of Geant4Exec::run. The factory specification is the typical string "<factory_name>/<instance name>". If no instance name is specified it defaults to the factory name. \author M.Frank """ return self.addPhaseAction('stop', factory_specification) def execute(self, num_events=None): """ Execute the Geant 4 program with all steps. \author M.Frank """ self.kernel().configure() self.kernel().initialize() if num_events: self.kernel().NumEvents = num_events self.kernel().run() self.kernel().terminate() return self def printDetectors(self): """ Scan the list of detectors and print detector name and sensitive type \author M.Frank """ logger.info('+++ List of sensitive detectors:') for i in self.description.detectors(): o = DetElement(i.second.ptr()) # noqa: F405 sd = self.description.sensitiveDetector(str(o.name())) if sd.isValid(): typ = sd.type() sdtyp = 'Unknown' if typ in self.sensitive_types: sdtyp = self.sensitive_types[typ] logger.info('+++ %-32s type:%-12s --> Sensitive type: %s', o.name(), typ, sdtyp) def setupDetectors(self): """ Scan the list of detectors and assign the proper sensitive actions \author M.Frank """ seq = None actions = [] logger.info('+++ Setting up sensitive detectors:') for i in self.description.detectors(): o = DetElement(i.second.ptr()) # noqa: F405 sd = self.description.sensitiveDetector(str(o.name())) if sd.isValid(): typ = sd.type() sdtyp = 'Unknown' if typ in self.sensitive_types: sdtyp = self.sensitive_types[typ] seq, act = self.setupDetector(o.name(), sdtyp, collections=None) logger.info('+++ %-32s type:%-12s --> Sensitive type: %s', o.name(), typ, sdtyp) actions.append(act) continue logger.info('+++ %-32s --> UNKNOWN Sensitive type: %s', o.name(), typ) return (seq, actions) def setupDetector(self, name, action, collections=None): """ Setup single subdetector and assign the proper sensitive action \author M.Frank """ # fg: allow the action to be a tuple with parameter dictionary sensitive_type = "" parameterDict = {} if isinstance(action, tuple) or isinstance(action, list): sensitive_type = action[0] parameterDict = action[1] else: sensitive_type = action seq = SensitiveSequence(self.kernel(), 'Geant4SensDetActionSequence/' + name) seq.enableUI() acts = [] if collections is None: sd = self.description.sensitiveDetector(str(name)) ro = sd.readout() collections = ro.collectionNames() if len(collections) == 0: act = SensitiveAction(self.kernel(), sensitive_type + '/' + name + 'Handler', name) for parameter, value in six.iteritems(parameterDict): setattr(act, parameter, value) acts.append(act) # Work down the collections if present if collections is not None: for coll in collections: params = {} if isinstance(coll, tuple) or isinstance(coll, list): if len(coll) > 2: coll_nam = str(coll[0]) sensitive_type = coll[1] params = str(coll[2]) elif len(coll) > 1: coll_nam = str(coll[0]) sensitive_type = coll[1] else: coll_nam = str(coll[0]) else: coll_nam = str(coll) act = SensitiveAction(self.kernel(), sensitive_type + '/' + coll_nam + 'Handler', name) act.CollectionName = coll_nam for parameter, value in six.iteritems(params): setattr(act, parameter, value) acts.append(act) for act in acts: act.enableUI() seq.add(act) if len(acts) > 1: return (seq, acts) return (seq, acts[0]) def setupCalorimeter(self, name, type=None, collections=None): """ Setup subdetector of type 'calorimeter' and assign the proper sensitive action \author M.Frank """ self.description.sensitiveDetector(str(name)) # sd.setType('calorimeter') if type is None: type = self.sensitive_types['calorimeter'] return self.setupDetector(name, type, collections) def setupTracker(self, name, type=None, collections=None): """ Setup subdetector of type 'tracker' and assign the proper sensitive action \author M.Frank """ self.description.sensitiveDetector(str(name)) # sd.setType('tracker') if type is None: type = self.sensitive_types['tracker'] return self.setupDetector(name, type, collections) def _private_setupField(self, field, stepper, equation, prt): import g4units field.stepper = stepper field.equation = equation field.eps_min = 5e-05 * g4units.mm field.eps_max = 0.001 * g4units.mm field.min_chord_step = 0.01 * g4units.mm field.delta_chord = 0.25 * g4units.mm field.delta_intersection = 0.001 * g4units.mm field.delta_one_step = 0.01 * g4units.mm field.largest_step = 1000 * g4units.m if prt: logger.info('+++++> %s %s %s %s ', field.name, '-> stepper = ', str(field.stepper), '') logger.info('+++++> %s %s %s %s ', field.name, '-> equation = ', str(field.equation), '') logger.info('+++++> %s %s %s %s ', field.name, '-> eps_min = ', str(field.eps_min), '[mm]') logger.info('+++++> %s %s %s %s ', field.name, '-> eps_max = ', str(field.eps_max), '[mm]') logger.info('+++++> %s %s %s %s ', field.name, '-> delta_chord = ', str(field.delta_chord), '[mm]') logger.info('+++++> %s %s %s %s ', field.name, '-> min_chord_step = ', str(field.min_chord_step), '[mm]') logger.info('+++++> %s %s %s %s ', field.name, '-> delta_one_step = ', str(field.delta_one_step), '[mm]') logger.info('+++++> %s %s %s %s ', field.name, '-> delta_intersection = ', str(field.delta_intersection), '[mm]') logger.info('+++++> %s %s %s %s ', field.name, '-> largest_step = ', str(field.largest_step), '[mm]') return field def setupTrackingFieldMT(self, name='MagFieldTrackingSetup', stepper='ClassicalRK4', equation='Mag_UsualEqRhs', prt=False): seq, fld = self.addDetectorConstruction("Geant4FieldTrackingConstruction/" + name) self._private_setupField(fld, stepper, equation, prt) return (seq, fld) def setupTrackingField(self, name='MagFieldTrackingSetup', stepper='ClassicalRK4', equation='Mag_UsualEqRhs', prt=False): field = self.addConfig('Geant4FieldTrackingSetupAction/' + name) self._private_setupField(field, stepper, equation, prt) return field def setupPhysics(self, name): phys = self.master().physicsList() phys.extends = name phys.decays = True phys.enableUI() phys.dump() return phys def addPhysics(self, name): phys = self.master().physicsList() opt = PhysicsList(self.master(), name) opt.enableUI() phys.adopt(opt) return opt def setupGun(self, name, particle, energy, typ="Geant4ParticleGun", isotrop=True, multiplicity=1, position=(0.0, 0.0, 0.0), register=True, **args): gun = GeneratorAction(self.kernel(), typ + "/" + name, True) for i in args.items(): setattr(gun, i[0], i[1]) gun.Energy = energy gun.particle = particle gun.multiplicity = multiplicity gun.position = position gun.isotrop = isotrop gun.enableUI() if register: self.kernel().generatorAction().add(gun) return gun def setupROOTOutput(self, name, output, mc_truth=True): """ Configure ROOT output for the simulated events \author M.Frank """ evt_root = EventAction(self.kernel(), 'Geant4Output2ROOT/' + name, True) evt_root.HandleMCTruth = mc_truth evt_root.Control = True if not output.endswith('.root'): output = output + '.root' evt_root.Output = output evt_root.enableUI() self.kernel().eventAction().add(evt_root) return evt_root def setupLCIOOutput(self, name, output): """ Configure LCIO output for the simulated events \author M.Frank """ evt_lcio = EventAction(self.kernel(), 'Geant4Output2LCIO/' + name, True) evt_lcio.Control = True evt_lcio.Output = output evt_lcio.enableUI() self.kernel().eventAction().add(evt_lcio) return evt_lcio def setupEDM4hepOutput(self, name, output): """Configure EDM4hep root output for the simulated events.""" evt_edm4hep = EventAction(self.kernel(), 'Geant4Output2EDM4hep/' + name, True) evt_edm4hep.Control = True evt_edm4hep.Output = output evt_edm4hep.enableUI() self.kernel().eventAction().add(evt_edm4hep) return evt_edm4hep def buildInputStage(self, generator_input_modules, output_level=None, have_mctruth=True): """ Generic build of the input stage with multiple input modules. Actions executed are: 1) Register Generation initialization action 2) Append all modules to build the complete input record These modules are readers/particle sources, boosters and/or smearing actions. 3) Merge all existing interaction records 4) Add the MC truth handler \author M.Frank """ ga = self.kernel().generatorAction() # Register Generation initialization action gen = GeneratorAction(self.kernel(), "Geant4GeneratorActionInit/GenerationInit") if output_level is not None: gen.OutputLevel = output_level ga.adopt(gen) # Now append all modules to build the complete input record # These modules are readers/particle sources, boosters and/or smearing actions for gen in generator_input_modules: gen.enableUI() if output_level is not None: gen.OutputLevel = output_level ga.adopt(gen) # Merge all existing interaction records gen = GeneratorAction(self.kernel(), "Geant4InteractionMerger/InteractionMerger") gen.enableUI() if output_level is not None: gen.OutputLevel = output_level ga.adopt(gen) # Finally generate Geant4 primaries if have_mctruth: gen = GeneratorAction(self.kernel(), "Geant4PrimaryHandler/PrimaryHandler") gen.RejectPDGs = "{1,2,3,4,5,6,21,23,24}" gen.enableUI() if output_level is not None: gen.OutputLevel = output_level ga.adopt(gen) # Puuuhh! All done. return self def run(self): """ Execute the main Geant4 action \author M.Frank """ from ROOT import PyDDG4 PyDDG4.run(self.master().get()) return self Simple = Geant4